61157162020 has 12 divisors (see below), whose sum is σ = 128430040284. Its totient is φ = 24462864800.

The previous prime is 61157161997. The next prime is 61157162063. The reversal of 61157162020 is 2026175116.

It can be written as a sum of positive squares in 2 ways, for example, as 10971305536 + 50185856484 = 104744^2 + 224022^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528929031 + ... + 1528929070.

It is an arithmetic number, because the mean of its divisors is an integer number (10702503357).

Almost surely, 2^61157162020 is an apocalyptic number.

It is an amenable number.

61157162020 is an abundant number, since it is smaller than the sum of its proper divisors (67272878264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61157162020 is a wasteful number, since it uses less digits than its factorization.

61157162020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057858110 (or 3057858108 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 61157162020 in words is "sixty-one billion, one hundred fifty-seven million, one hundred sixty-two thousand, twenty".